CAJ | 학술논문

【目的】研究和阐明桉树(Eucalyptus spp.)连栽对植被盖度、植物多样性和功能群的影响。【方法】采用空间代替时间和定位监测相结合的方法,对Ⅰ~Ⅲ代连栽林分的植被盖度、植物多样性和功能群进行研究。【结果】连栽不仅降低林下植物的物种多样性,还将改变植物的功能群组成；连栽降低乔木和藤本植物营养体和种子库的有效性,增强草本植物的有效性。不同连栽代数植被盖度与植物多样性的关系不同。第Ⅰ代林的物种丰富度与林冠层盖度和灌木层盖度呈紧密的正相关(P<0.05,n=18),而第Ⅱ代林和第Ⅲ代林则表现为紧密的负相关(P<0.05,n=18)。连栽对乔木层盖度影响不大,但显著地降低灌木、草本层的盖度。【结论】连栽对植物多样性具有显著的负效应。随着连栽代数的增加,林下植物功能群向草本、小型和一年生植物功能群转变趋势明显。
【목적】연구화천명안수(Eucalyptus spp.)련재대식피개도、식물다양성화공능군적영향。【방법】채용공간대체시간화정위감측상결합적방법,대Ⅰ~Ⅲ대련재림분적식피개도、식물다양성화공능군진행연구。【결과】련재불부강저림하식물적물충다양성,환장개변식물적공능군조성；련재강저교목화등본식물영양체화충자고적유효성,증강초본식물적유효성。불동련재대수식피개도여식물다양성적관계불동。제Ⅰ대림적물충봉부도여림관층개도화관목층개도정긴밀적정상관(P<0.05,n=18),이제Ⅱ대림화제Ⅲ대림칙표현위긴밀적부상관(P<0.05,n=18)。련재대교목층개도영향불대,단현저지강저관목、초본층적개도。【결론】련재대식물다양성구유현저적부효응。수착련재대수적증가,림하식물공능군향초본、소형화일년생식물공능군전변추세명현。
[Objective]This paper aimed to evaluate the effects of multi-successive rotations on vegetation cover,species diversity and functional groups in eucalypt plantation.[Methods]By the methods of time-space series analysis and field monitoring,the vegetation cover,species di-versity and functional groups were studied from first to third successive rotations in eucalypt plantation.[Results]The successive rotations of eucalypt plantation revealed not only to reduce species diversity but also to change the composi-tion of plant functional groups.The successive short-rotation of eucalypt plantation decreased propagule availability of tall tree and vine spe-cies,but increased grasss.The relationship be-tween vegetation cover and plant species diversi-ty was different among different successive rota-tions of eucalypt plantations.The species richness was significant positive for canopy cover and shrub layer cover of understory vegetation in first rotation stands (P<0.05,n=18),but was significant negative in second rotation stands and third rotation stands of eucalypt plantations ( P<0.05,n=18).The successive rotation reduced to the understory vegetation cover strong-ly,but showed a little influence on the canopy cover.[Conclusion]The successive rotation in eu-calypt plantation had significant negative effects on plant species diversity.The plant functional group trended obviously to the grass,small-sized and annual plants over successive rotations.